John a



(N0 Model.)

J. A. BOWYER.

TELLURIAN.

No. 249,739. Patented NOV. 22,1881.

UNITED STATES PATENT OFFICE.

JOHN A. BOWYER, OF LA PORTE, INDIANA, ASSIGNOR, BY MESNE ASSIGN- MENT,OF ONE-HALF TO JAMES OBRIEN AND FRANK E. OSBORN.

TELLURIAN.

SPECIFICATION forming part of Letters Patent No. 249,739, dated November22, 1881.

Application filed April 12, 1881. (N model.) I

To all whom it may concern:

Be it known that I, JOHN A. BOWYER, of La Porte, in the county of LaPorto and State of Indiana,have invented certain new and usefulImprovements in Tellurians, of which the following is a specification.

This invention relates to certain improvements upon the tellurianpatented to me on the 5th of April, 188], in Patent No. 239,644;

to and it consists in the novel features hereinafter described andclaimed.

In the drawings accompanying this specification, Figure 1 is a sideelevation of a tellurian embodying my present invention. Fig.

1 2 is a central vertical section of a joint of the part thereof towhich the invention relates.

A represents the base-piece or pedestal upon which the whole mechanismis mounted.

B is the arm upon which the earth-globe b is mounted, provided with asocket, to, fitting the pedestal-pivot, so the arm may revolve upon thesame.

The direction of the suu is represented by the needle 0, secured to theupright shaft 0,

2 5 secured in the socket a. The earth-axis D is secured to the arm (I,which is held in the spindie (1, working in ahollowsleeve secured to thearm B.

d is a band passing around the pulley d,

0 rigidly fixed to the pedestal and the pulley d on the spindle d.

E represents the ecliptic, supported on the curved arm E, secured by theclamp-screw E to the slotted bracket E which extends from 5 the sleeve,already mentioned, embracing the spindle d.

The parts above described correspond withv the same parts in my saidpatent of April 5, 1881.

G is the moon globe, vertically adjustable upon a rod, 9 stationarilyheld upon the sleeve g upon the end of a horizontal arm, g, mounted uponand revolving about the said sleeve upon the spindle d. The rod g isbent into rect- 5 angular form, and its point is stepped in the bend ofanother upright rod, g, secured in a socket in the upper end of thespindle 9 At the lower end of this spindle is a pulley, g",

which a band, 9 passing around it and pulley g rigidly secured to saidsleeve upon the spindle d,.actuates as the arm 9 and the parts carriedupon it are swung around the earth.

Upon the rod g is adj ustably secured a hemispherical shield, H,conforming in dimension to the moons surface, and located so as to '55cover one-half thereof at all times, it being intended that like changesin the vertical adiustmentshall be made of both moon and shield. Thisshield rotates around the moon as the latter is swung on the arm 9, andit is intended to represent the side of the moon illuminated by the sun,and to change position as the two planets change relatively, keeping itsface at all times turned toward the sun, and thus exhibit the differentphases of the moon. At the same time, by the construction shown, themoonglobe presentsthe same side at all times to the earth, and I am thusenabled to illustrate another peculiarity of these bodies. By making thebend in the rod 9 short it becomes pos- 7o sible for the shield and itssupport to pass throughthe bend of the rod supporting the moon.

L is a pointer for indicating the earths position upon the dial upon thebase-piece, and K is a compass indicating the direction of' the northpole, substantially as in my former patent.

I am aware that non rotating shields accompanying andrepresenting thedarkened 8o half of earth-globes, which were revoluble at pleasure byhand, have been used, and such combination of the shield with a globe Ido not claim.

1 claim-'- 8 In a telluriau .embracingand designed to illustrate themovements of the moon relative to both the sun and earth, thecombination, with the moon-globe, of a hemispherical shield,supported'and operated automatically by mech- 9o anism substantially asdescribed.

JOHN A. BOWYER.

Witnesses EVERETT BROWN, H. M. MUNDAY.

